Signal transmission method, terminal, and network device

ABSTRACT

A signal transmission method, a terminal and a network device are provided which relate to a wireless communication field to realize efficient SRS transmission. The method performed by the terminal includes: sending, to a network device, first indication information which is used to indicate, to the network device, at least one of: number of first SRS resource sets required by the terminal, number of first SRS resources in a first SRS resource set, maximum layer number of uplink multi-antenna transmission of the terminal, whether uplink transmission channels of the terminal are coherent, and maximum number of PTRS ports supported for uplink transmission by the terminal, and is used by the network device to determine second indication information used to instruct the terminal to send an SRS signal; receiving second indication information sent by the network device; sending an SRS signal according to second indication information.

CROSS-REFERENCE TO RELATED APPLICATION

This application is the U.S. national phase of PCT Application No.PCT/CN2018/109722 filed on Oct. 10, 2018, which claims priority to aChinese Patent Application No. 201711149122.7 entitled “SIGNALTRANSMISSION METHOD, TERMINAL, AND NETWORK DEVICE” filed before SIPO onNov. 17, 2017, the disclosures of which are incorporated in theirentirety by reference herein.

TECHNICAL FIELD

The present disclosure relates to the field of radio communicationtechnology, in particular relates to a signal transmission method, aterminal, and a network device.

BACKGROUND

In a Fifth-Generation (New Radio (NR)) system, there may be animplementation in which multiple terminals exist simultaneously due tocomplexity of a NR application scenario. However, in the related art,when a terminal reports capability information of the terminal per se,there are a plurality of redundant terminal capabilities and structures,so that a signaling overhead is over large.

SUMMARY

Some embodiments of the present disclosure provide a signal transmissionmethod, a terminal, and a network device, so as to realizing efficienttransmission of an SRS signal.

In order to achieve that above objectives, some embodiments of theapplication adopt follow technical solutions.

In a first aspect, a signal transmission method is provided. The methodincludes: sending, by a terminal, first indication information to anetwork device; wherein the first indication information is used toindicate, to the network device, at least one of following: the numberof first Sounding Reference Signal (SRS) resource sets required by theterminal, the number of first SRS resources in each of the first SRSresource sets, the maximum number of layers of uplink multi-antennatransmission of the terminal, whether uplink transmission channels ofthe terminal are coherent, and the maximum number of Phase TrackingReference Signal (PTRS) ports supported for uplink transmission by theterminal, wherein the first indication information is used by thenetwork device to determine second indication information, the secondindication information is used to instruct the terminal to send an SRSsignal; receiving, by the terminal, the second indication informationsent by the network device; sending the SRS signal by the terminalaccording to the second indication information.

In a second aspect, a signal transmission method is provided. The methodincludes: receiving, by a network device, first indication informationsent by a terminal; wherein the first indication information is used toindicate, to the network device, at least one of following: the numberof first Sounding Reference Signal (SRS) resource sets required by theterminal, the number of first SRS resources in each of the first SRSresource sets, the maximum number of layers of uplink multi-antennatransmission of the terminal, whether uplink transmission channels ofthe terminal are coherent, and the maximum number of Phase TrackingReference Signal (PTRS) ports supported for uplink transmission by theterminal, wherein the first indication information is used by thenetwork device to determine second indication information, the secondindication information is used to instruct the terminal to send an SRSsignal; determining the second indication information by the networkdevice according to the first indication information; sending the secondindication information to the terminal by the network device; receiving,by the network device, the SRS signal sent by the terminal.

In a third aspect, a terminal is provided. The terminal includes: asending module, used to send first indication information to a networkdevice; wherein the first indication information is used to indicate, tothe network device, at least one of following: the number of firstSounding Reference Signal (SRS) resource sets required by the terminal,the number of first SRS resources in each of the first SRS resourcesets, the maximum number of layers of uplink multi-antenna transmissionof the terminal, whether uplink transmission channels of the terminalare coherent, and the maximum number of Phase Tracking Reference Signal(PTRS) ports supported for uplink transmission by the terminal, whereinthe first indication information is used by the network device todetermine second indication information, the second indicationinformation is used to instruct the terminal to send an SRS signal; anda receiving module, used to receive the second indication informationsent by the network device; wherein the sending module is further usedto send the SRS signal according to the second indication information.

In a fourth aspect, a network device is provided. The network deviceincludes: a receiving module, used to receive first indicationinformation sent by a terminal; wherein the first indication informationis used to indicate, to the network device, at least one of following:the number of first Sounding Reference Signal (SRS) resource setsrequired by the terminal, the number of first SRS resources in each ofthe first SRS resource sets, the maximum number of layers of uplinkmulti-antenna transmission of the terminal, whether uplink transmissionchannels of the terminal are coherent, and the maximum number of PhaseTracking Reference Signal (PTRS) ports supported for uplink transmissionby the terminal, wherein the first indication information is used by thenetwork device to determine second indication information, the secondindication information is used to instruct the terminal to send an SRSsignal; a determining module, used to determine the second indicationinformation according to the first indication information; a sendingmodule, used to send the second indication information to the terminal;wherein the receiving module is further used to receive the SRS signalsent by the terminal.

In a fifth aspect, a terminal is provided. The terminal includes aprocessor, a storage, and a computer program stored on the storage andexecutable by the processor, wherein when the computer program isexecuted by the processor, the processor implements the steps of thesignal transmission method according to the first aspect.

In a sixth aspect, a network device is provided. The network deviceincludes a processor, a storage, and a computer program stored on thestorage and executable by the processor, wherein when the computerprogram is executed by the processor, the processor implements the stepsof the signal transmission method according to the second aspect.

In a seventh aspect, a compute readable storage medium is provided. Acomputer program is stored on the computer readable storage medium. Thesteps of the signal transmission method according to the first aspect orthe steps of the signal transmission method according to the secondaspect are implemented when the computer program is executed by aprocessor.

In the embodiments of the present disclosure, the terminal sends firstindication information to a network device, wherein the first indicationinformation is used to indicate, to the network device, at least one offollowing: the number of first Sounding Reference Signal (SRS) resourcesets required by the terminal, the number of first SRS resources in eachof the first SRS resource sets, the maximum number of layers of uplinkmulti-antenna transmission of the terminal, whether uplink transmissionchannels of the terminal are coherent, and the maximum number of PhaseTracking Reference Signal (PTRS) ports supported for uplink transmissionby the terminal, wherein the first indication information is used by thenetwork device to determine second indication information, the secondindication information is used to instruct the terminal to send an SRSsignal; the terminal receives the second indication information sent bythe network device; and the terminal sends the SRS signal according tothe second indication information.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a first flowchart of a signal transmission method according tosome embodiments of the present disclosure;

FIG. 2 is a second flowchart of a signal transmission method accordingto some embodiments of the present disclosure;

FIG. 3 is a schematic structural diagram of a terminal according to someembodiments of the present disclosure;

FIG. 4 is a schematic structural diagram of a network device accordingto some embodiments of the present disclosure;

FIG. 5 is a schematic diagram of a hardware structure of a terminalaccording to some embodiments of the present disclosure;

FIG. 6 is a schematic diagram of a hardware structure of a networkdevice according to some embodiments of the present disclosure.

DETAILED DESCRIPTION

Technical solutions in some embodiments of the present disclosure willbe clearly and completely described hereinafter in conjunction withaccompanying drawings in some embodiments of the present disclosure, andit is obvious that the described embodiments are a part, rather thanall, of the embodiments of the present disclosure. Based on theembodiments of the present disclosure, all other embodiments obtained bythose of ordinary skill in the art without paying creative labor arewithin the protection scope of the present disclosure.

The technical solutions provided by the present disclosure can beapplied to various communication systems, for example, Fifth-Generation(5G) communication systems, future evolutional systems or variouscommunication-fusion systems, and the like. Various applicationscenarios may be included, such as machine to machine (M2M), D2M,macro-micro communication, enhance Mobile Broadband (eMBB), ultrareliable & low latency communication (URLLC) and massive machine typecommunication (mMTC) and the like. These scenarios include, but are notlimited to, communication between a terminal and a terminal,communication between a network device and a network device,communication between a network device and a terminal, and the like. Theembodiments of the present disclosure may be applied to thecommunication between a network device and a terminal, or thecommunication between a terminal and a terminal, or the communicationbetween a network device and a network device in a 5G communicationsystem.

A communication system involved in the embodiments of the presentdisclosure includes at least one network device and one or moreterminals to which each of the at least one network device is connected.

The network device may be a base station, a core network device, aTransmission Reference Point (TRP), a relay station, an access point, orthe like. The network device may be a Base Transceiver Station (BTS) inGlobal system for Mobile communication (GSM) or a Code Division MultipleAccess (CDMA) network, or may be an NB (Node B) in a Wideband CodeDivision Multiple Access (WCDMA) system, or may be an eNB or an eNodeB(evolutional Node B) in a Long Term Evolution (LTE) system. The networkdevice may also be a radio controller in a context of a cloud radioaccess network (CRAN). The network device may also be a network devicein the 5G communication system or a network device in the futureevolutional network.

The terminal may be a wireless terminal or a wired terminal. Thewireless terminal may be a device providing voice and/or other servicedata connectivity to a user, a handheld device having a wirelesscommunication function, a computing device or other processing devicesconnected to a wireless modem, an in-vehicle device, a wearable device,a terminal in a future 5G network or a terminal in a future evolved PLMNnetwork, or the like. The wireless terminal may communicate with one ormore core networks via a Radio Access Network (RAN), and the wirelessterminal may be a mobile terminal, such as a mobile telephone (orreferred to as a “cellular” phone) and a computer having a mobileterminal, for example, may be a portable mobile device, a pocket-sizedmobile device, a handheld mobile device, a computer-built-in mobiledevice or an on-board mobile device that exchanges language and/or datawith a radio access network, and devices such as a PersonalCommunication Service (PCS) telephone, a cordless telephone, a SessionInitiation Protocol (SIP) telephone, a Wireless Local Loop (WLL)station, and a Personal Digital Assistant (PDA); the wireless terminalmay be a mobile device or a User Equipment (UE), a terminal, an accessterminal, a wireless communication device, a terminal unit, a terminalstation, a Mobile Station, a Mobile, a Remote Station, a remote station,a Remote Terminal, a Subscriber Unit, a Subscriber Station, a UserAgent, a terminal device, and the like. The above are merely examplesand are not limited to those in practical applications.

Some of terms involved in the present disclosure are explained below tofacilitate understanding of a reader.

1. Regarding Beam Measurement and Beam Reporting

Analog beamforming is full-band transmission, and an array element ineach polarization direction on a panel of each high-frequency antennaarray can only transmit an analog beam in a time-division-multiplexingmanner. A shaping weight of the analog beam is realized by adjustingparameters of an RF front-end phase shifter and other devices.Currently, in academia and industry, training of analog beamformingvectors is usually carried out using a polling method. That is, arrayelements in various polarization directions on each antenna panel of theterminal sequentially transmit training signals (i.e., candidate shapingvectors) at a predefined time in a time-division-multiplexing manner,the training signals are used by a network side or a terminal side toindicate in next beam training or service transmission.

2. Regarding Downlink Beam Indication

Based on the beam measurement and beam reporting, the network sideselects a corresponding beam for signal transmission while indicatinginformation of the corresponding beam to the terminal, and the terminalperforms signal reception depending on beam indication. At present, ithas been specified that the beam indication is dynamic indication in aphysical layer control channel.

3. Regarding Uplink Beam Indication (SRI or CRI)

The uplink beam indication refers to an indication, by the network side,of an uplink beam used by the terminal. This indication needs to be usedin both uplink beam training and an uplink transmission procedure. Anuplink beam training procedure currently discussed includes U1, U2, andU3. U1 represents preliminary training of an UL transmission beam and anUL reception beam, U2 represents fine training of the UL transmissionbeam, and U3 represents fine training of the UL reception beam.

In processes of U2 and U3, the network side notifies, using knowninformation, the terminal to transmit the correspond beam. For example,through the U1 process, the network side has preliminarily known whichpanel at the terminal side corresponds to better uplink transmission. Inthe U2 process, the SRI instructs the terminal to transmit differentbeams on corresponding panels to perform finer training of atransmission beam; in the U3 process, the SRI may also be used toinstruct the terminal to transmit a plurality of beams on these panelsto facilitate a receiving end to perform training of a reception beam.

In a case that there is symmetry in a network, CRI information may beused to implicitly indicate corresponding uplink beam information.

4. Regarding Uplink Transmission Mode

Current uplink transmission modes are divided into two types, one typeis a mode of codebook based transmission, one type is a mode ofnon-codebook based transmission. In a case of the codebook basedtransmission, the network instructs a corresponding codeword to theterminal according to a predetermined codebook, and the terminalperforms multi-antenna precoding according to the instruction of thenetwork and performs uplink transmission. In case of non-codebook basedtransmission, the network indicates a correspond SRS index (SRI) to theterminal, the terminal determines precoding corresponding to actual datatransmission according to precoding used by the SRS.

5. Other Terms

Such term as “and/or” herein is merely a term for describing anassociation relation of associated objects, and may indicate that thereare three relations, for example “A and/or B” may mean that A existsalone, A and B exist simultaneously, and B exists alone. In addition,such character as “/” herein generally indicate that associated objectsbefore and after “/” have a “or” relation therebetween; in a formula,the character “/” indicates that the associated objects before and after“/” have a “divide” relation. If not stated, such term as “multiple” or“a plurality of” herein refers to two or more.

In order to facilitate clear description of the technical solutions ofembodiments of the present disclosure, in the embodiments of the presentdisclosure, such words as “first”, “second” and the like are used todistinguish same or similar items having substantially the same functionor effect, and those skilled in the art may understand that such wordsas “first”, “second” and the like do not limit the number and anexecution order.

It should be noted that in the embodiments of the present disclosure,such words as “exemplary” or “for example” or “e.g.” are used torepresent examples, cases, or illustrations. Any embodiment or designdescribed as “exemplary” or “e.g.” in the embodiments of the presentdisclosure should not be construed as being more preferred oradvantageous than other embodiments or designs. To be precise, usage ofwords such as “exemplary” or “e.g.” is intended to present relevantconcepts in a specific manner.

First Embodiment

FIG. 1 shows a flowchart of a signal transmission method provided by thepresent disclosure. In particular, that method includes steps S201-S203.

S201: sending first indication information to a network device by aterminal.

The first indication information is used to indicate capabilityinformation of the terminal to the network device, and specificallyindicates at least one of following: the number of first SRS resourcesets required by the terminal, the number of first SRS resources in eachof the first SRS resource sets, the maximum number of layers of uplinkmulti-antenna transmission of the terminal, whether uplink transmissionchannels of the terminal are coherent, the maximum number of PTRS (PhaseTracking Reference Signal) ports; the first indication information isused by the network device to determine second indication information,the second indication information is used to instruct the terminal tosend a Sounding Reference Signal (SRS) signal.

Whether the uplink transmission channels of the terminal are coherentincludes following three types: a first type in which the uplinktransmission channels of the terminal are fully-coherent, that is, RFchannels of the terminal are fully-coherent, a second type in which theuplink transmission channels of the terminal are non-coherent, that is,RF channels of the terminal are non-coherent, and a third type in whichthe uplink transmission channels of the terminal are partially-coherent,that is, a part of the RF channels of the terminal is coherent, forexample, RF channel 1 and RF channel 3 are coherent, and RF channel 2and RF channel 4 are coherent. For the type of partial coherence, whichports are coherent may be determined according to pre-specified rules.

S202: sending second indication information to the terminal by thenetwork device according to the first indication information.

S203: sending an SRS signal by the terminal according to the secondinstruction information.

For example, when the terminal sends, to the network device, capabilityinformation of the terminal indicated in the first indicationinformation, the capability information of the terminal may be directlyexplicitly indicated, that is, specific capability information of theterminal is included in the first indication information and sent to thenetwork device, or may be implicitly indicated, that is, othercapability information may be implicitly indicated based on at least oneof the above-described five types of capability information.

1) For the number of first SRS resource sets, the first indicationinformation may directly include the number of the first SRS resourcesets, or the number of the first SRS resource sets may be implicitlyindicated through other capability information of the terminal, forexample, the number of SRS resource sets required by the terminalcorresponds to the number of antenna panels of the terminal in aone-to-one manner, for example, when the number of antenna panels of theterminal is 2, the number of SRS resource sets is 2.

2) For the number of first SRS resources in the first SRS resource set:the first indication information may directly include the number of thefirst SRS resources in the first SRS resource set, or the number of thefirst SRS resources in the first SRS resource set may be implicitlyindicated by other capability information of the terminal, specifically,how to indicate may be performed according to the following examples1-2.

Example 1: the first indication information is specifically used toindicate the number of analog beams required by an antenna panel of theterminal, the number of analog beams is used to indicate the number offirst SRS resources, generally, the number of sources in each resourceset is the same as the number of analog beams required by each antennapanel.

Specifically, when information of the number of analog beams required bythe terminal has a hierarchical structure, the first indicationinformation is specifically used to indicate the number of analog beamsrequired by an antenna panel of the terminal, and the first indicationinformation includes at least one of: the total number of analog beamsin all analog beam layers of the antenna panel, the number of analogbeams required by each analog beam layer of the antenna panel, and thenumber of analog beams in a first analog beam layer of the antennapanel. The first analog beam layer is an analog beam layer having thelargest number of analog beams in all analog beam layers of the antennapanel. For example, when the terminal determines the number of analogbeams required by an antenna panel, the terminal may make a reportaccording to an analog-beam level relation of the terminal per se; if abeam level of an antenna of the terminal includes two layers, i.e. afirst level including a beam 0 and a beam 5 and a second level includingbeams 1 to 4 and 6 to 9, and when the terminal makes a report actually,whether to report the total number of beams required by all levels (e.g.5 beams per panel) or the number of beams required by a level having themaximum number of beams (e.g. 4 beams per panel), or the number of beamsrequired by each level (the number of beams required by the first levelis 1, and the number of beams required by the second level is 4) may bedetermined in advance through standardization (e.g. a protocol).

Example 2: the first indication information is specifically used toindicate the number of first SRS resources, and the number of first SRSresources is used to indicate the number of analog beams.

3) For the maximum number of layers for uplink multi-antennatransmission of the terminal or the number of layers for each antennapanel, the maximum number of layers of uplink multi-antenna transmissionof the terminal is used to represent the total number of uplink datachannels of the terminal, and the number of layers of each antenna panelis used to represent the number of each antenna panel. The terminal maydirectly report the maximum number of layers through the firstindication information, thereby implicitly reporting the total number ofuplink data channels of the terminal to the network device, and directlyreport the number of layers of each antenna panel through the firstindication information, thereby implicitly reporting the number of eachantenna panel. Optionally, the terminal can directly report the totalnumber of uplink data channels of the terminal through the firstindication information, thereby implicitly reporting the maximum numberof layers to the network device, and directly report the number of eachantenna panel through the first indication information, therebyimplicitly reporting the number of layers of each antenna panel.

If the terminal reports the number of each antenna panel, the number offirst SRS resources may be obtained by multiplying the number of eachantenna panel by the number of first SRS resources reported.

Further, the maximum number of layers of the uplink multi-antennatransmission of the terminal or the number of layers of each antennapanel can also be implicitly obtained through other capabilityinformation of the terminal according to a predetermined rule.

4) For phase information among uplink transmission channels of theterminal, the first indication information may directly include phaseinformation among the uplink transmission channels of the terminal, orphase information among the uplink transmission channels of the terminalmay be implicitly indicated through other capability information of theterminal, specifically, how to indicate may be performed according tothe following examples.

Example 1: the first indication information is used to indicate thatuplink transmission channels of the terminal are fully-coherent, whereinthe first indication information is that the number of first SRSresource sets is 1 and the maximum number of layers is greater than 1;or, Example 2: the first indication information is used to indicate thatuplink transmission channels of the terminal are non-coherent, and thefirst indication information is that the number of the first SRSresource sets is the same as the maximum number of layers; or, Example3: the first indication information is used to indicate the uplinktransmission channels of the terminal are partially-coherent, and thefirst indication information is that the number of the first SRSresource sets is greater than 1 and the maximum number of layers isgreater than 1.

Optionally, coherence information among the uplink transmission channelsis used to indicate the maximum number of PTRS ports; or, the maximumnumber of layers and the number of first SRS resource sets are used toindicate the maximum number of PTRS ports; or, the maximum number ofPTRS ports is used to indicate whether the uplink transmission channelsare coherent; or, the maximum number of PTRS ports and the number oflayers are used to indicate whether the uplink transmission channels arecoherent.

In an example, the first indication information may explicitly displaythe maximum number of PTRS ports and implicitly indicate the coherenceinformation among uplink transmission channels based on the maximumnumber of PTRS ports, specifically how to indicate may be performedaccording to following example 1-2.

Example 1: coherence information among uplink transmission channels isused to indicate the maximum number of PTRS ports described above; thefirst indication information is used to indicate that uplinktransmission channels of the terminal are fully-coherent, the firstindication information is that the maximum number of PTRS ports is 1;or, the first indication information is used to indicate that uplinktransmission channels of the terminal are non-coherent, and the firstindication information is that the maximum number of PTRS ports is thesame as the maximum number of layers; or, the first indicationinformation is used to indicate the uplink transmission channels of theterminal are partially-coherent, and the first indication information isthat the maximum number of PTRS ports is the number of the first SRSresource sets.

Example 2: the maximum number of layers and the number of first SRSresource sets are used to indicate the maximum number of PTRS ports; thefirst indication information is used to indicate that the number of thefirst SRS resource sets is 1 and the maximum number of layers is greaterthan 1, and the first indication information is that the maximum numberof PTRS ports is 1; or, the first indication information is used toindicate that the number of the first SRS resource sets is the same asthe maximum number of layers, and the first indication information isthat the maximum number of PTRS ports is the same as the maximum numberof layers; or, the first indication information is used to indicate thatthe number of the first SRS resource sets is greater than 1 and themaximum number of layers is greater than 1 and the maximum number ofPTRS ports, and the first indication information is that the maximumnumber of PTRS ports is the number of the first SRS resource sets.

Example 3: the maximum number of PTRS ports is used to indicate whetherthe uplink transmission channels are coherent; the first indicationinformation is used to indicate uplink transmission channels of theterminal are fully-coherent, and the first indication information isthat the maximum number of PTRS ports is 1.

Example 4: the maximum number of PTRS ports is used to indicate whetherthe uplink transmission channels are coherent; the first indicationinformation is used to indicate that uplink transmission channels of theterminal are non-coherent, and the first indication information is thatthe maximum number of PTRS ports is the same as the maximum number oflayers, and, the maximum number of PTRS ports is great than 1; or, thefirst indication information is used to indicate the uplink transmissionchannels of the terminal are partially-coherent, the first indicationinformation is that the maximum number of PTRS ports is greater than 1,and, the maximum number of PTRS ports is less than the maximum number oflayers.

Optionally, the second indication information is used to instruct theterminal to send the SRS signal according to a first predetermined rule.

The first predetermined rule includes: sending the SRS signal using asecond SRS resource configured by the network device, performing atleast one of beam repetition and beam-scanning using an analog beam inthe highest analog beam layer of the antenna panel, performingbeam-training or beam-scanning on all beams, performing beam-scanningaccording to an analog beam in the lowest analog beam layer of theantenna panel, calculating a transmission power according to agranularity of a second SRS resource set, sending the SRS signalsimultaneously on each second SRS resource in each second SRS resourceset, and performing precoding on the SRS signal according to a precodinggranularity indicated by the network device.

Further optionally, if the second indication information is further usedto indicate at least one second SRS resource set, then the firstpredetermined rule is to perform beam-repetition using an analog beam inthe highest analog beam layer of the antenna panel, wherein each secondSRS resource set indicated by the second indication information includesa second SRS resource; the first predetermined rule is to performbeam-training or beam-scanning on all beams or perform beam-repetitionusing an analog beam in the highest analog beam layer of the antennapanel, or perform beam-scanning using an analog beam in the highestanalog beam layer of the antenna panel, wherein the second indicationinformation indicates at least one second SRS resource set, and thenumber of second SRS resources indicated by the second indicationinformation is the same as the number of the first SRS resources.

Illustratively, the network device configures the second SRS resourcesfor the terminal according to an indication of the first indicationinformation, and the terminal sends the SRS signal according toconfigured information and a predetermined or standardized rule.

Example 1: the second SRS resource configured for the terminal by thenetwork device is divided into two types, one type is a resource forbeam management, the other type is a resource for acquiring channelstate information, and when the network device configures the two typesof second SRS resources for the terminal, usage of correspondingresources may be indicated directly.

Example 2: when the network device configures, for the terminal, thesecond SRS resource for beam management, 1) the network device performsresource configuration according to the number of first SRS resourcesets and the number of first SRS resources within each first SRSresource set indicated by the first indication information; 2) thenetwork device may configure a first SRS resource for each first SRSresource set, and in such as case, the terminal assumes that beamtraining is performed using the highest-level beam; 3) if the networkdevice performs configuration according to the maximum number ofresources in each first SRS resource set indicated by the firstindication information, and if the network device has no otherindication indicating a beam scanning behavior of the terminal, then theterminal performs beam training on all beams; 4) if the network deviceperforms configuration according to the maximum number of resources ineach first SRS resource set reported by the terminal, and if the networkdevice indicates beam repetition, but does not indicate a correspondingtransmission beam, then the terminal performs beam repetition accordingto the highest-level beam; 5) if the network device performsconfiguration according to the maximum number of resources in the firstSRS resource set reported by the terminal, and if the network deviceindicates beam scanning, but does not indicate a correspondingtransmission beam, the terminal performs beam scanning on alltransmission beams, or performs beam scanning on the lowest-level beam;6) the network device may also perform resource configuration accordingto a hierarchical beam information reported by the terminal, that is,when the first indication information is used to indicate thehierarchical beam information, the network device may perform resourceconfiguration according to the hierarchical beam information.

Exemplarily, the network device may instruct the terminal of precodinggranularity when the network device configures the SRS, and the terminalperforms corresponding precoding on the SRS signal according to theindicated granularity; if the network device does not indicate or nostandardization or no technical specification is provided, then theterminal needs to assume that the network will perform channelestimation according to continuously allocated bandwidth.

Optionally, if the second indication information is used to instruct theterminal to identify the second SRS resource according to a firstpredetermined rule, then the first predetermined rule includes:identifying the second SRS resource as an SRS resource for acquiringchannel information for an uplink transmission channel in the codebookbased transmission, identifying the second SRS resource as an SRSresource for acquiring channel information for an uplink transmissionchannel in non-codebook based transmission.

Further optionally, when the second indication information is used toindicate that the number of ports of the second SRS resource is greaterthan 1, the first predetermined rule is to identify the second SRSresource as the SRS resource for acquiring channel information of anuplink transmission channel in the codebook based transmission. When thesecond indication information is used to indicate that the number ofports of the second SRS resource is 1, the first predetermined rule isto identify the second SRS resource as an SRS resource for acquiringchannel information of an uplink transmission channel in thenon-codebook based transmission.

Further optionally, when the second indication information is used toindicate that the number of ports of the second SRS resource is greaterthan 1, the first predetermined rule is to identify the second SRSresource as an SRS resource for acquiring channel information of anuplink transmission channel in the codebook based transmission; thesecond indication information is further used to indicate beaminformation of different ports in the second SRS resource, the number ofdifferent beams indicated for all ports of a second SRS resource is thesame as the number of the first SRS resource sets, the first indicationinformation is used to indicate the number of the first SRS resourcesets; or, the second indication information is further used to indicatedifferent pieces of beam information of various ports in the second SRSresource, the number of beams indicated for all ports of a second SRSresource is determined by information, in the first indicationinformation, indicating whether the uplink transmission channels of theterminal are coherent; or, the second indication information is used toinstruct the terminal to select, according to a predeterminedport-numbering rule, ports of different antennas to send the SRS signal.

Illustratively, if the number of ports of a single second SRS resourcein the second SRS resource set is greater than 1, then the terminalconsiders that the second SRS resource in the second SRS resource set isused for acquiring channel information of an uplink transmission channelin the codebook based transmission.

Example 1: the second SRS resource set is defined by a protocol to haveonly one second SRS resource, and the number of ports of the second SRSresource is the same as the maximum number of layers.

Example 2: in respect of the number of beams of different ports of thesame second SRS resource within the second SRS resource set, differentports are allowed to use different beams, different beams may beindicated for different ports of the same second SRS resource by aplurality of SRIs. For example, the number of beams indicated by thenetwork device to the terminal is the same as the number of second SRSresource sets indicated by the first indication information; or, whenthe number of second SRS resource sets reported by the terminal issmaller than the maximum number of layers reported by the terminal, arelation between an indicated beam and a corresponding second SRSresource port may be specified in advance.

Example 3: the number of beams indicated by the network device to theterminal may also be determined by information, reported by theterminal, about whether uplink transmission channels are coherent.

Illustratively, if the second indication information is also used toindicate the number of beams, the first indication information is usedto indicate whether uplink transmission channels of the terminal arecoherent; the first indication information is used to indicate thatuplink transmission channels of the terminal are non-coherent, and thesecond indication information is specifically used to indicate that thenumber of beams is 1 to indicate one beam for each port; or, the firstindication information is used to indicate phases of uplink transmissionchannels of the terminal are partially coherent, and the secondindication information is specifically used to indicate a beam for eachport pair; or, the first indication information is used to indicatephases of uplink transmission channels of the terminal are partiallycoherent, and the second indication information is specifically used toindicate a beam for each port pair; the above port pair ispre-specified.

Illustratively, when a terminal performs uplink SRS transmission, SRSsignals of different antennas need to be arranged according to aport-numbering rule previously specified. In case of partial coherence,for example, it may be specified in advance that a port 1 and a port 3are coherent, a port 2 and a port 4 are coherent, and when an SRS is tobe sent, the terminal needs, according to this specification, to combinecoherent antennas to send the SRS.

Optionally, the second indication information is used to indicate thatthe number of ports of the second SRS resource is 1, the firstpredetermined rule is to identify the second SRS resource as an SRSresource for acquiring channel information of an uplink transmissionchannel in a non-codebook based transmission mode; the second indicationinformation is specifically used to indicate at least one second SRSresource set and a CSI-RS corresponding to each second SRS resource set,and the CSI-RS is specifically used to instruct the terminal tocalculate a precoding vector for an SRS resource within thecorresponding second SRS resource set, or the second indicationinformation is specifically used to indicate a transmission beamcorresponding to each second SRS resource, or, the SRS signal includesat least two first SRS signals, and the second indication information isused to indicate that the terminal sorts the at least two first SRSsignals prior to sending the at least two first SRS signals subjected toprecoding.

Further optionally, the second SRS resources are precoded among theantennas that are coherent, or the second SRS resources are precodedamong at least two antennas that are non-coherent.

Further optionally, a rule of the sorting is a predefined rule, or arule configured by the network device which includes sorting accordingto a condition of whether phases of ports are coherent.

Illustratively, if each second SRS resource within the second SRSresource set has only one port, the terminal considers the second SRSresource set to be used as a non-codebook based transmission.

Example 1: the network device may uniformly configure or dynamicallyindicate, for the second SRS resource set, a CSI-RS for acquiringchannel information and calculating a precoding vector (e.g., aprecoding weight) when the terminal sends an SRS in the second SRSresource set.

Example 2: the network device may configure or dynamically indicate atransmission beam for each second SRS resource within the second SRSresource set. respectively.

Example 3: when the terminal performs precoding on an SRS signal, theprecoding is only performed among antennas that are coherent, and theprecoding is not performed within a resource among two antennas that arenon-coherent.

Example 4: when the terminal performs uplink transmission on theprecoded SRS signal, the terminal sorts SRS transmission according tocoherence information among uplink transmission channels reportedpreviously and the maximum number of layers. For example, if thecoherence information is the ‘fully coherent’ or the ‘non-coherent’, noparticular specification is provided; if the coherent information is the‘partial coherent’, then the SRS transmission is sorted in a predefinedorder, for example, coherent ports are sorted first and thenphase-incoherent ports are sorted. For example, if the maximum number oflayers is 4 and the coherence information is the ‘partial coherent’,then in SRSs transmitted by the terminal, SRSs corresponding to SRI=1and SRI=2 are specified to be sent from the same group of coherent portpairs, and SRSs corresponding to SRI=3 and SRI=4 are specified to besent from another group of coherent port pairs.

Second Embodiment

On basis of the first embodiment, if the first indication information isalso used to indicate the network device to determine third indicationinformation, FIG. 2 shows another flow diagram of a signal transmissionmethod provided by the present disclosure. In particular, that methodincludes S301-S302.

S301: sending third indication information to a terminal by the networkdevice according to the first indication information.

The third indication information is used to instruct a transmission modeof uplink data transmitted by the terminal to the network device, thetransmission mode includes codebook based transmission and non-codebookbased transmission, and the first indication information is also used bythe network device to determine the third indication information.

S302: sending uplink data to the network device by the terminalaccording to the transmission mode indicated by the third instructioninformation.

Optionally, the third indication information is used to indicate asecond SRS resource. The second SRS resource includes a resource foracquiring channel state information in codebook based transmission, andthe transmission mode of the uplink data is codebook based transmission;or, the second SRS resource includes a resource for acquiring channelstate information in non-codebook based transmission, and thetransmission mode of the uplink data is the non-codebook basedtransmission; or, the second SRS resource does not include the resourcefor acquiring channel state information of a codebook transmissionchannel or the resource for acquiring channel state information of anon-codebook transmission channel, then the transmission mode of theuplink data is the non-codebook based transmission; or, the second SRSresource does not include the resource for acquiring channel stateinformation of the codebook transmission channel or the resource foracquiring channel state information of the non-codebook transmissionchannel, then, the transmission mode of the uplink data is the codebookbased transmission; or, the third indication information directlyindicates whether the transmission mode of the uplink data is thecodebook based transmission or the non-codebook based transmission.

Further optionally, the second SRS resource is indicated by anidentifier (ID) of the second SRS resource set and an index of aresource in the resource set.

Illustratively, the network device may also notify the terminal of acorresponding transmission behavior in an implicit manner.

Example 1: if the second SRS resource indicated by the network deviceincludes an SRS for acquiring a CSI of codebook based transmission, datatransmission corresponding to the second SRS resource is codebook basedtransmission.

Example 2: the second SRS resource indicated by the network device tothe terminal may be the SRI, i.e., the SRS Resource Index, or may be anID of the SRS resource set.

Example 3: if the second SRS resource indicated by the network deviceincludes an SRS resource for acquiring a CSI of non-codebook basedtransmission, corresponding data transmission is non-codebook basedtransmission.

Example 4: the second SRS resource indicated by the network device tothe terminal may be the SRS Resource Index, i.e., SRI, or the ID of theSRS resource set, or the ID of an SRS resource set may be indicatedfirst, and then the SRI within the SRS resource set is indicated.

Example 5: if the second SRS resource indicated by the network deviceneither includes the SRS resource for acquiring a CSI of codebook basedtransmission, nor includes the SRS resource for acquiring a CSI ofnon-codebook based transmission, corresponding data transmission isconsidered to be the non-codebook based transmission; in such a case,the SRI mainly indicates an SRS for beam management.

Optionally, when the third indication information or the second SRSresource indicates the non-codebook based transmission, the terminaladopts the same transmission beam and transmission precoding mode asthat for the second SRS resource.

Optionally, when the third indication information or the second SRSresource indicates the codebook based transmission, the terminal employsthe same transmission beam as that for the second SRS resource.

Optionally, the third indication information is used to indicate anassociation relation between a PTRS port and a DMRS port of theterminal; wherein the association relation is used to indicate thetransmission mode.

Optionally, the transmission mode is the codebook based transmission,and the third indication information is further used to indicate codingmatrix information (Transmission Precoding Matrix Indicator (TPMI)) ofthe terminal and the maximum number of layers. The terminal maydetermine, through information of the SRI or the SRS set indicated bythe network device, a beam to be used.

Illustratively, if the network device indicates the non-codebook basedtransmission, the terminal may simultaneously obtain, through the SRI,uplink beam information and uplink precoding weight information (same asthe SRI or SRI set being indicated), the association relation betweenthe SRI and the DMRS port indicated by the network device is determinedaccording to a one-to-one mapping rule specified in advance.

Optionally, the method further includes S303.

S303: receiving, by the terminal, the fourth indication information sentby the network device.

Optionally, the fourth indication information is used to instruct theterminal to use one PTRS port; if the maximum number of PTRS portsindicated by the first indication information is 1 or the fourthindication information is used to instruct the terminal to use one PTRSport, and the maximum number of layers is less than or equal to 4, thenthe PTRS port is associated with a predefined DMRS port; or, if themaximum number of PTRS ports indicated by the first indicationinformation is 1 or the fourth indication information is used toinstruct the terminal to use one PTRS port, and the maximum number oflayers is greater than 4, then the third indication information is usedto indicate that the PTRS port is associated with a predefined DMRSport.

Illustratively, when the terminal has only one PTRS port or the networkconfigures the terminal to use only one PTRS port s, when the maximumnumber of layers is less than or equal to 4 (<=4), the PTRS port isassociated with a DMRS port numbered the lowest/highest value or a DMRSport determined according to another rule (i.e., the same precoding isused); when the maximum number of layers is larger than 4 (>4), the PTRSport is associated with the DMRS port with a lowest numbering value inlayers with a lower CQI (i.e. the same precoding is used), or stillassociated with a DMRS port numbered the lowest/highest value or a DMRSport determined according to another rule, among all DMRS ports; whenchannels of the terminal are non-coherent and the number of PTRS portsreported based on the capability of the terminal is more than one, eachDMRS port is associated with one PTRS port (i.e., the same precoding isused); the one-to-one mapping rule can be specified in advance, and insuch a case, the maximum number of layers allowed for the terminal canbe further defined to be the same as the number of PTRS ports.

Optionally, the fourth indication information is used to indicate thatthe terminal uses two PTRS ports. If the maximum number of PTRS ports is2 or the fourth indication information is used to instruct that theterminal uses two PTRS ports, and data transmission ports correspondingto the TPMI are in one of two groups of data transmission portsspecified in advance, then the number of PTRS ports available for theDMRS port is equal to 1, and the PTRS port is associated with the DMRSport; or, if the maximum number of PTRS ports is 2 or the fourthindication information is used to indicate that the terminal uses twoPTRS ports, the data transmission port corresponding to the TPMI is notin one of two groups of data transmission ports specified in advance,then the number of PTRS ports available for the DMRS port is greaterthan 1, and the first DMRS port corresponding to each group of datatransmission ports is associated with one PTRS port.

Further optionally, a grouping rule for grouping the two groups of datatransmission ports specified in advance is obtained according to acodebook; or, the grouping rule for grouping the two groups of datatransmission ports specified in advance is obtained according tocoherence information, reported by the terminal to the network, oftransmission channels.

Further optionally, the first DMRS port corresponding to each group ofdata transmission ports is determined in a manner specified orconfigured in advance.

Illustratively, for the codebook based transmission, following Examplesare provided.

Example 1: when the network configures that the terminal has at most onePTRS port, the port is associated with the DMRS port with thelowest/highest numbering value or the DMRS port determined according toother rules (i.e., the same precoding is adopted).

Example 2: when the network configures that the terminal has at most twoPTRS ports, processing is performed according to following rules 1-2.

Rule 1: which ports can use the same PTRS port is determined accordingto a rule specified in advance.

Rule 2: if a port corresponding to the TPMI indicated by the networkdevice can use the same PTRS port according to the above rule, one PTRSport is used; if the port corresponding to the TPMI indicated by thenetwork needs to use more than one PTRS port according to the aboverule, two PTRS ports are used. For example, if only one PTRS port isused, the PTRS port is associated with the DMRS port with thelowest/highest numbering value or the DMRS port determined according toanother rule; if two PTRS port are used, that DMRS ports are groupedaccording to an indication for the TPMI, the DMRS ports capable ofsharing one PTRS port are grouped into a group, each of the PTRS portsis associated with the DMRS port with the lowest/highest numbering valueor the DMRS value determined according to another rule.

Optionally, the first indication information is used to indicate uplinktransmission channels of the terminal are fully-coherent, and the datatransmission ports are grouped into one group; or, the first indicationinformation is used to indicate that the data transmission ports aregrouped into two groups when the uplink transmission channels of theterminal are non-coherent or when the uplink transmission channels ofthe terminal are partially-coherent.

Optionally, the association relation between the PTRS port and the DMRSport is determined by the terminal according to the coherenceinformation among the uplink transmission channels indicated by thefirst indication information.

Optionally, if the transmission mode is the non-codebook basedtransmission, then the second SRS resource indicated by the secondindication information is used to determine the number of PTRS ports,and an association between a DMRS port and a PTRS port used by theterminal.

Optionally, the second SRS resources are a plurality of second SRSresources for non-codebook based transmission, and whether a PTRS portcan be shared among the plurality of second SRS resources is predefinedor configured by the network device.

For example, for a terminal with partial coherence, if the number ofPTRS ports configured by the network is greater than 1, then following“1)” to “2)” are provided.

1) In case of codebook based transmission, the corresponding associationrelation is determined according to the indication of the TPMI.

Example 1: in the case of codebook based transmission, the correspondingassociation relation is determined according to the indication of TPMI.For example, if all antennas corresponding to transmission indicated bythe TPMI are within one port air that is coherent, only one PTRS port isused, and the PTRS port is associated with the lowest DMRS port, in sucha case, which ports belong to the port fair that is coherent isdetermined according to a rule specified in advance.

Example 2: if the transmission indicated by the TPMI corresponds to morethan one port fair that are coherent, more than one PTRS port need to beused; only one PTRS port is used if ports corresponding to thetransmission indicated by the TPMI are all within one port air that iscoherent. For example, if only one PTRS port is used, the PTRS port isassociated with the DRMS port with the lowest/highest numbering value orthe DMRS port determined according to another rule, or if two PTRS portsare used, the DMRS ports are grouped according to the indication of theTPMI, the DMRS ports corresponding to one port pair that is coherent aretaken as a group, the PTRS ports are associated with the DRMS port withthe lowest/highest numbering value or the DMRS port determined accordingto another rule, in the groups, respectively.

2) In case of the non-codebook based transmission, whether differentSRIs can share PTRS ports is determined according to rulespecified/configured in advance, and thereafter the number of PTRS portsrequired is determined, see following examples.

Example 1: the maximum number of layers is 4, and a partially-coherentcondition exists. In an SRS sent by the terminal, SRSs corresponding toSRI=1 and SRI=2 are specified to share one PTRS port; SRSs correspondingto SRI=3 and SRI=4 are specified to share the other PTRS port.

Example 2: the terminal determines, according to an SRI indication fromthe network, whether to use one or two PTRS ports. For example, uplinktransmission triggered by the network is 2-layer transmission,corresponding two layers are SRI=1 and SRI=2, respectively, then onlyone PTRS port is used. If the uplink transmission triggered by thenetwork is 2-layer transmission and corresponding two layers are SRI=1and SRI=4, respectively, then two PTRS ports need to be used.

Example 3: the DMRS port with the lowest numbering value is associatedwithin a corresponding combination. If the uplink transmission triggeredby the network is 4-layer transmission and DMRS ports=1˜4 correspond toSRIs=1˜4, respectively, then two PTRS ports need to be used, the firstPTRS port corresponds to a DMRS port 1, and the second PTRS portcorresponds to a DMRS port 3.

In the embodiments of the present disclosure, capability informationreported by a plurality of terminals are combined and correspondingcapability information is determined through a plurality of implicitrules, and an SRS transmission mode corresponding to a User Equipment(UE) is determined by the implicit rules, an uplink transmissionbehavior of the UE is determined according to various types ofinstructions and implicit rules; a mapping rule between a PTRS port anda DMRS port is determined by the implicit rules and a preconfiguredspecification.

FIG. 3 is a schematic structural diagram of a terminal provided by someembodiments of the present disclosure. As shown in FIG. 3, the terminalincludes a sending module 40 and a receiving module 41. The sendingmodule 40 is used to send first indication information to a networkdevice; wherein the first indication information is used to indicate, tothe network device, at least one of following: the number of firstuplink sounding signal (SRS) resource sets required by the terminal, thenumber of first SRS resources in each of the first SRS resource sets,the maximum number of layers of uplink multi-antenna transmission of theterminal, whether uplink transmission channels of the terminal arecoherent, the maximum number of PTRS (Phase Tracking Reference Signal)ports supported for uplink transmission by the terminal. The firstindication information is used by the network device to determine secondindication information, the second indication information is used toinstruct the terminal to send a Sounding Reference Signal (SRS) signal.The receiving module 41 is used to receive the second indicationinformation sent by the network device; the sending module 40 is furtherused to send an SRS signal according to the second instructioninformation.

Optionally, the first indication information is further used by thenetwork device to determine third indication information. The receivingmodule 41 is further used to receive the third indication informationsent by the network device. The third indication information is used toindicate a transmission mode of uplink data sent by the terminal to thenetwork device, and the transmission mode includes a codebook basedtransmission and non-codebook based transmission; the sending module isfurther used to send uplink data to the network device according to thetransmission mode indicated by the third indication information.

Optionally, the first indication information includes at least one offollowing: the number of first SRS resource sets, the number of firstSRS resources, the maximum number of layers, and coherence informationamong uplink transmission channels; wherein at least one of following:the number of first SRS resource sets, the number of first SRSresources, and the maximum number of layers is used to indicate whetherthe uplink transmission channels, are coherent.

Optionally, the first indication information is used to indicate thatuplink transmission channels of the terminal are fully-coherent, whereinthe first indication information is that the number of first SRSresource sets is 1 and the maximum number of layers is greater than 1;or, the first indication information is used to indicate that uplinktransmission channels of the terminal are non-coherent, and the firstindication information is that the number of the first SRS resource setsis the same as the maximum number of layers; or, the first indicationinformation is used to indicate the uplink transmission channels of theterminal are partially-coherent, and the first indication information isthat the number of the first SRS resource sets is greater than 1 and themaximum number of layers is greater than 1.

Optionally, the first indication information includes at least one offollowing: the number of first SRS resource sets, the number of firstSRS resources, the maximum number of layers, coherence information amonguplink transmission channels, and the maximum number of PTRS ports;wherein coherence information among uplink transmission channels is usedto indicate the maximum number of PTRS ports; or the maximum number oflayers and the number of first SRS resource sets are used to indicatethe maximum number of PTRS ports; or the maximum number of PTRS ports isused to indicate whether the uplink transmission channels are coherent;or the maximum number of PTRS ports and the number of layers are used toindicate whether the uplink transmission channels are coherent.

Optionally, coherence information among uplink transmission channels isused to indicate the maximum number of PTRS ports; the first indicationinformation is used to indicate that uplink transmission channels of theterminal are coherent, and the first indication information is that themaximum number of PTRS ports is 1; or, the first indication informationis used to indicate that uplink transmission channels of the terminalare non-coherent, and the first indication information is that themaximum number of PTRS ports is the same as the maximum number oflayers; or, the first indication information is used to indicate theuplink transmission channels of the terminal are partially-coherent, andthe first indication information is that the maximum number of PTRSports is the number of the first SRS resource set; or, the maximumnumber of layers and the number of first SRS resource sets are used toindicate the maximum number of PTRS ports, the first indicationinformation is used to indicate that the number of first SRS resourcesets is 1 and the maximum number of layers is greater than 1, and thefirst indication information is that the maximum number of PTRS ports is1; or, the first indication information is used to indicate that thenumber of first SRS resource sets and the maximum number of layers arethe same, and the first indication information is that the maximumnumber of PTRS ports is the same as the maximum number of layers; or,the first indication information is used to indicate that the number offirst SRS resource sets is greater than 1 and the maximum number oflayers is greater than the maximum number of PTRS ports, and the firstindication information is that the maximum number of PTRS ports is thenumber of first SRS resource sets; or, the maximum number of PTRS portsis used to indicate whether the uplink transmission channels arecoherent, the first indication information is used to indicate uplinktransmission channels of the terminal are fully-coherent, and the firstindication information is that the maximum number of PTRS ports is 1;or, the PTRS maximum number of PTRS ports is used to indicate whetherthe uplink transmission channels are coherent, the first indicationinformation is used to indicate that uplink transmission channels of theterminal are non-coherent, the first indication information is that themaximum number of PTRS ports is the same as the maximum number oflayers, and the maximum number of PTRS ports is greater than 1; or, thefirst indication information is used to indicate that the uplinktransmission channels of the terminal are partially-coherent, the firstindication information is that the maximum number of PTRS ports isgreater than 1, and the maximum number of PTRS ports is less than themaximum number of layers.

Optionally, the first indication information is specifically used toindicate the number of analog beams required by one antenna panel of theterminal; wherein the number of analog beams is used to indicate thenumber of first SRS resource sets and the number of first SRS resources;or, the first indication information is specifically used to indicatethe number of first SRS resource sets and the number of first SRSresources, the number of first SRS resource sets and the number of firstSRS resources are used to indicate the number of analog beams.

Optionally, the first indication information is specifically used toindicate the number of analog beams required by one antenna panel of theterminal. The first indication information includes at least one offollowing: the total number of analog beams in all analog beam layers ofthe antenna panel, the number of analog beams required by each analogbeam layer of the antenna panel, and the number of analog beams in afirst analog beam layer of the antenna panel; wherein the first analogbeam layer is an analog beam layer having the largest number of analogbeams in all analog beam layers of the antenna panel.

Optionally, the second indication information is used to instruct theterminal to send the SRS signal according to the first predeterminedrule.

Optionally, the first predetermined rule includes: sending the SRSsignal using a second SRS resource configured by the network device,performing at least one of beam repetition and beam-scanning using ananalog beam in the highest analog beam layer of the antenna panel,performing beam-training or beam-scanning on all beams, performingbeam-scanning according to an analog beam in the lowest analog beamlayer of the antenna panel, calculating a transmission power accordingto a granularity of a second SRS resource set, sending the SRS signalsimultaneously on each second SRS resource in each second SRS resourceset, and performing precoding on the SRS signal according to a precodinggranularity indicated by the network device.

Optionally, the second indication information is further used toindicate at least one second SRS resource set. The first predeterminedrule is to perform beam-repetition using an analog beam in the highestanalog beam layer of the antenna panel, each second SRS resource setindicated by the second indication information includes one second SRSresource; the first predetermined rule is to perform beam-training orbeam-scanning on all beams or perform beam-repetition using an analogbeam in the highest analog beam layer of the antenna panel, or performbeam-scanning using an analog beam in the highest analog beam layer ofthe antenna panel, the second indication information indicates at leastone second SRS resource set, and the number of second SRS resourcesindicated by the second indication information is the same as the numberof the first SRS resources.

Optionally, the second indication information is used to instruct theterminal to identify the second SRS resource according to a firstpredetermined rule. The first predetermined rule includes: identifyingthe second SRS resource as an SRS resource for acquiring channelinformation for an uplink transmission channel in the codebook basedtransmission, identifying the second SRS resource as an SRS resource foracquiring channel information for an uplink transmission channel innon-codebook based transmission.

Optionally, the second indication information is used to indicate thatthe number of ports of the second SRS resources is greater than 1. Thefirst predetermined rule is to identify the second SRS resource as theSRS resource for acquiring channel information of an uplink transmissionchannel in the codebook based transmission. The second indicationinformation is used to indicate that the number of ports of the secondSRS resources is 1, the first predetermined rule is to identify thesecond SRS resource as an SRS resource for acquiring channel informationof an uplink transmission channel in the non-codebook basedtransmission.

Optionally, the second indication information is used to indicate thatthe number of ports of the second SRS resources is greater than 1, thefirst predetermined rule is to identify the second SRS resource as anSRS resource for acquiring channel information of an uplink transmissionchannel in the codebook based transmission. The second indicationinformation is further used to indicate beam information of differentports in the second SRS resource, and the number of different beamsindicated for all ports of one second SRS resource is the same as thenumber of the first SRS resource sets, and the first indicationinformation is used to indicate the number of the first SRS resourcesets; or, the second indication information is further used to indicatebeam information of different ports in the second SRS resource, thenumber of different beams indicated for all ports of one second SRSresource is determined by information, in the first indicationinformation, indicating whether the uplink transmission channels of theterminal are coherent; or, the second indication information is used toinstruct the terminal to select, according to a predeterminedport-numbering rule, ports of different antennas to send the SRS signal.

Optionally, the second indication information is further used toindicate the number of beams, and the first indication information isused to indicate whether the uplink transmission channels of theterminal are coherent; the first indication information is used toindicate that uplink transmission channels of the terminal arenon-coherent, and the second indication information is specifically usedto indicate that the number of beams is 1 to indicate one beam for eachport; or, the first indication information is used to indicate uplinktransmission channels of the terminal are partially coherent, and thesecond indication information is specifically used to indicate one beamfor each port pair; or, the first indication information is used toindicate uplink transmission channels of the terminal are partiallycoherent, and the second indication information is specifically used toindicate one beam for each port pair; the port pair is pre-specified.

Optionally, the second indication information is used to indicate thatthe number of ports of the second SRS resource is 1, the firstpredetermined rule is to identify the second SRS resource as an SRSresource for acquiring channel information of an uplink transmissionchannel in a non-codebook based transmission mode; the second indicationinformation is specifically used to indicate at least one second SRSresource set and a CSI-RS corresponding to each second SRS resource set,and the CSI-RS is specifically used to instruct the terminal tocalculate a precoding vector for an SRS resource within thecorresponding second SRS resource set, or the second indicationinformation is specifically used to indicate a transmission beamcorresponding to each second SRS resource, or, the SRS signal includesat least two first SRS signals, and the second indication information isused to indicate that the terminal sorts the at least two first SRSsignals prior to transmitting the at least two first SRS signalssubjected to precoding.

Optionally, the second SRS resources are precoded among the antennasthat are coherent, or the second SRS resources are precoded among atleast two antennas that are non-coherent.

Optionally, a rule of the sorting is a predefined rule, or a ruleconfigured by the network device which includes sorting according to acondition of whether phases of ports are coherent.

Optionally, the third indication information is used to indicate asecond SRS resource. The second SRS resource includes a resource foracquiring channel state information in codebook based transmission, andthe transmission mode of the uplink data is codebook based transmission;or, the second SRS resource includes a resource for acquiring channelstate information in non-codebook based transmission, and thetransmission mode of the uplink data is the non-codebook basedtransmission; or, the second SRS resource does not include the resourcefor acquiring channel state information of a codebook transmissionchannel or the resource for acquiring channel state information of anon-codebook transmission channel, then the transmission mode of theuplink data is the non-codebook based transmission; or, the second SRSresource does not include the resource for acquiring channel stateinformation of the codebook transmission channel or the resource foracquiring channel state information of the non-codebook transmissionchannel, then, the transmission mode of the uplink data is the codebookbased transmission; or, the third indication information directlyindicates whether the transmission mode of the uplink data is thecodebook based transmission or the non-codebook based transmission.

Optionally, the second SRS resource is indicated by an identifier (ID)of the second SRS resource set and an index of a resource in theresource set.

Optionally, when the third indication information or the second SRSresource indicates the non-codebook based transmission, the terminaladopts the same transmission beam and transmission precoding mode asthat for the second SRS resource.

Optionally, when the third indication information or the second SRSresource indicates the codebook based transmission, the terminal employsthe same transmission beam as that for the second SRS resource.

Optionally, the third indication information is used to indicate anassociation relation between a PTRS port and a DMRS port of theterminal; wherein the association relation is used to indicate precodingor a resource location used by the terminal for transmission of a PTRSport.

Optionally, the transmission mode is codebook based transmission, andthe third indication information is also used to indicate coding matrixinformation (Transmission Precoding Matrix Indicator (TPMI)) of theterminal and the maximum number of layers.

Optionally, the receiving module 41 is further used to receive fourthindication information sent by the network device.

Optionally, the fourth indication information is used to instruct theterminal to use one PTRS port; if the maximum number of PTRS portsindicated by the first indication information is 1 or the fourthindication information is used to instruct the terminal to use one PTRSport, and the maximum number of layers is less than or equal to 4, thenthe PTRS port is associated with a predefined DMRS port; or, if themaximum number of PTRS ports indicated by the first indicationinformation is 1 or the fourth indication information is used toinstruct the terminal to use one PTRS port, and the maximum number oflayers is greater than 4, then the third indication information is usedto indicate that the PTRS port is associated with a predefined DMRSport.

Optionally, the fourth indication information is used to indicate thatthe terminal uses two PTRS ports. If the maximum number of PTRS ports is2 or the fourth indication information is used to instruct that theterminal uses two PTRS ports, and data transmission ports correspondingto the TPMI are in one of two groups of data transmission portsspecified in advance, then the number of PTRS ports available for theDMRS port is equal to 1, and the PTRS port is associated with the DMRSport; or, if the maximum number of PTRS ports is 2 or the fourthindication information is used to indicate that the terminal uses twoPTRS ports, the data transmission port corresponding to the TPMI is notin one of two groups of data transmission ports specified in advance,then the number of PTRS ports available for the DMRS port is greaterthan 1, the first DMRS port corresponding to each group of datatransmission ports is associated with one PTRS port.

Optionally, a grouping rule for grouping the two groups of datatransmission ports specified in advance is obtained according to acodebook; or, the grouping rule for grouping the two groups of datatransmission ports specified in advance is obtained according tocoherence information, reported by the terminal to the network, oftransmission channels.

Optionally, the first indication information is used to indicate uplinktransmission channels of the terminal are fully-coherent, and the datatransmission ports are grouped into one group; or, the first indicationinformation is used to indicate that the data transmission ports aregrouped into two groups when the uplink transmission channels of theterminal are non-coherent or when the uplink transmission channels ofthe terminal are partially-coherent.

Optionally, the association relation between the PTRS port and the DMRSport is determined by the terminal according to the coherenceinformation among the uplink transmission channels indicated by thefirst indication information.

Optionally, the first DMRS port corresponding to each group of datatransmission ports is determined in a manner specified or configured inadvance.

Optionally, if the transmission mode is the non-codebook basedtransmission, then the second SRS resource indicated by the secondindication information is used to determine the number of PTRS ports,and an association between a DMRS port and a PTRS port used by theterminal.

Optionally, the second SRS resources are a plurality of second SRSresources for non-codebook based transmission, and whether a PTRS portcan be shared among the plurality of second SRS resources is predefinedor configured by the network device.

In the embodiments of the present disclosure, the terminal sends thefirst indication information to the network device. The first indicationinformation is used to indicate, to the network device, at least one offollowing: the number of first Sounding Reference Signal (SRS) resourcesets required by the terminal, the number of first SRS resources in eachof the first SRS resource sets, the maximum number of layers of uplinkmulti-antenna transmission of the terminal, whether uplink transmissionchannels of the terminal are coherent, the maximum number of PTRS (PhaseTracking Reference Signal) ports supported for uplink transmission bythe terminal, wherein the first indication information is used by thenetwork device to determine second indication information, the secondindication information is used to instruct the terminal to send an SRSsignal. The terminal receives the second indication information sent bythe network device, and sends the SRS signal according to the secondindication information.

As shown in FIG. 4, some embodiments of the present disclosure providesa network device. The network device includes a receiving module 50, adetermining module 51, and a sending module 52. The receiving module 50is used to receive first indication information sent by a terminal;wherein the first indication information is used to indicate, to thenetwork device, at least one of following: the number of first SoundingReference Signal (SRS) resource sets required by the terminal, thenumber of first SRS resources in each of the first SRS resource sets,the maximum number of layers of uplink multi-antenna transmission of theterminal, whether uplink transmission channels of the terminal arecoherent, and the maximum number of PTRS (Phase Tracking ReferenceSignal) ports; the first indication information is used by the networkdevice to determine second indication information, the second indicationinformation is used to instruct the terminal to send an SRS signal. Thedetermining module 51 is used to determine second indication informationaccording to the first indication information. The sending module 52 isused to send the second indication information to the terminal. Thereceiving module 50 is further used to receive the SRS signal sent bythe terminal.

Optionally, the first indication information is further used by thenetwork device to determine third indication information. Thedetermining module 51 is further used to determine third indicationinformation according to the first indication information. The sendingmodule 52 is further used to send the third indication information tothe terminal. The third indication information is used to indicate atransmission mode of uplink data sent by the terminal to the networkdevice, and the transmission mode includes a codebook based transmissionand a non-codebook based transmission. The receiving module 50 isfurther used to receive the uplink data sent by the terminal accordingto the transmission mode indicated by the third indication information.

Optionally, the first indication information includes at least one offollowing: the number of first SRS resource sets, the number of firstSRS resources, the maximum number of layers, and coherence informationamong uplink transmission channels; wherein at least one of following:the number of first SRS resource sets, the number of the first SRSresources, and the maximum number of layers is used to indicate whetherthe uplink transmission channels, are coherent.

Optionally, the first indication information is used to indicate thatuplink transmission channels of the terminal are fully-coherent, thefirst indication information is that the number of first SRS resourcesets is 1 and the maximum number of layers is greater than 1; or, thefirst indication information is used to indicate that uplinktransmission channels of the terminal are non-coherent, and the firstindication information is that the number of the first SRS resource setsis the same as the maximum number of layers; or, the first indicationinformation is used to indicate the uplink transmission channels of theterminal are partially-coherent, and the first indication information isthat the number of the first SRS resource sets is greater than 1 and themaximum number of layers is greater than 1.

Optionally, the first indication information includes at least one offollowing: the number of first SRS resource sets, the number of firstSRS resources, the maximum number of layers, coherence information amonguplink transmission channels, and the maximum number of PTRS ports;wherein the coherence information among the uplink transmission channelsis used to indicate the maximum number of PTRS ports; or, the maximumnumber of layers and the number of first SRS resource sets are used toindicate the maximum number of PTRS ports; or, the maximum number ofPTRS ports is used to indicate whether the uplink transmission channelsare coherent; or, the maximum number of PTRS ports and the number oflayers are used to indicate whether the uplink transmission channels arecoherent.

Optionally, coherence information among uplink transmission channels isused to indicate the maximum number of PTRS ports; the first indicationinformation is used to indicate uplink transmission channels of theterminal are fully-coherent, and the first indication information isthat the maximum number of PTRS ports is 1; or, the first indicationinformation is used to indicate that uplink transmission channels of theterminal are non-coherent, and the first indication information is thatthe maximum number of PTRS ports is the same as the maximum number oflayers; or, the first indication information is used to indicate theuplink transmission channels of the terminal are partially-coherent, andthe first indication information is that the maximum number of PTRSports is the number of the first SRS resource sets;

or, the maximum number of layers and the number of first SRS resourcesets are used to indicate the maximum number of PTRS ports; the firstindication information is used to indicate that the number of the firstSRS resource sets is 1 and the maximum number of layers is greater than1, and the first indication information is that the maximum number ofPTRS ports is 1; or, the first indication information is used toindicate that the number of the first SRS resource sets is the same asthe maximum number of layers, and the first indication information isthat the maximum number of PTRS ports is the same as the maximum numberof layers; or, the first indication information is used to indicate thatthe number of the first SRS resource sets is greater than 1, and themaximum number of layers is greater than land the maximum number of PTRSports, and the first indication information is that the maximum numberof PTRS ports is the number of the first SRS resource sets;

or, the maximum number of PTRS ports is used to indicate whether theuplink transmission channels are coherent; the first indicationinformation is used to indicate uplink transmission channels of theterminal are fully-coherent, and the first indication information isthat the maximum number of PTRS ports is 1;

or, the maximum number of PTRS ports is used to indicate whether theuplink transmission channels are coherent; the first indicationinformation is used to indicate that uplink transmission channels of theterminal are non-coherent, and the first indication information is thatthe maximum number of PTRS ports is the same as the maximum number oflayers, and, the maximum number of PTRS ports is great than 1; or, thefirst indication information is used to indicate the uplink transmissionchannels of the terminal are partially-coherent, the first indicationinformation is that the maximum number of PTRS ports is greater than 1,and, the maximum number of PTRS ports is less than the maximum number oflayers.

Optionally, the first indication information is specifically used toindicate the number of analog beams required by an antenna panel of theterminal, the number of analog beams is used to indicate the number offirst SRS resource sets and the number of first SRS resources; or, thefirst indication information is specifically used to indicate the numberof first SRS resource sets and the number of first SRS resources, andthe number of first SRS resource sets and the number of first SRSresources are used to indicate the number of analog beams.

Optionally, the first indication information is specifically used toindicate the number of analog beams required by an antenna panel of theterminal, and the first indication information includes at least one of:the total number of analog beams in all analog beam layers of theantenna panel, the number of analog beams required by each analog beamlayer of the antenna panel, and the number of analog beams in a firstanalog beam layer of the antenna panel. The first analog beam layer isan analog beam layer having the largest number of analog beams in allanalog beam layers of the antenna panel.

Optionally, the second indication information is used to instruct theterminal to send the SRS signal according to a first predetermined rule.

Optionally, the first predetermined rule includes: sending the SRSsignal using a second SRS resource configured by the network device,performing at least one of beam repetition and beam-scanning using ananalog beam in the highest analog beam layer of the antenna panel,performing beam-training or beam-scanning on all beams, performingbeam-scanning according to an analog beam in the lowest analog beamlayer of the antenna panel, calculating a transmission power accordingto a granularity of a second SRS resource set, sending the SRS signalsimultaneously on each second SRS resource in each second SRS resourceset, and performing precoding on the SRS signal according to a precodinggranularity indicated by the network device.

Optionally, the second indication information is further used toindicate at least one second SRS resource set. The first predeterminedrule is to perform beam-repetition using an analog beam in the highestanalog beam layer of the antenna panel, each second SRS resource setindicated by the second indication information includes a second SRSresource. The first predetermined rule is to perform beam-training orbeam-scanning on all beams or perform beam-repetition using an analogbeam in the highest analog beam layer of the antenna panel, or performbeam-scanning using an analog beam in the highest analog beam layer ofthe antenna panel, the second indication information indicates at leastone second SRS resource set, and the number of second SRS resourcesindicated by the second indication information is the same as the numberof the first SRS resources.

Optionally, the second indication information is used to instruct theterminal to identify the second SRS resource according to a firstpredetermined rule; the first predetermined rule includes: identifyingthe second SRS resource as an SRS resource for acquiring channelinformation for an uplink transmission channel in the codebook basedtransmission, identifying the second SRS resource as an SRS resource foracquiring channel information for an uplink transmission channel innon-codebook based transmission.

Optionally, the second indication information is used to indicate thatthe number of ports of the second SRS resource is greater than 1, thefirst predetermined rule is to identify the second SRS resource as theSRS resource for acquiring channel information for an uplinktransmission channel in the codebook based transmission. The secondindication information is used to indicate that the number of ports ofthe second SRS resource is 1, the first predetermined rule is toidentify the second SRS resource as an SRS resource for acquiringchannel information of an uplink transmission channel in thenon-codebook based transmission.

The second indication information is used to indicate that the number ofports of the second SRS resource is greater than 1, the firstpredetermined rule is to identify the second SRS resource as an SRSresource for acquiring channel information of an uplink transmissionchannel in the codebook based transmission; wherein, the secondindication information is further used to indicate beam information ofdifferent ports in the second SRS resource, and the number of differentbeams indicated for all ports of a second SRS resource is the same asthe number of the first SRS resource sets, and the first indicationinformation is used to indicate the number of the first SRS resourcesets; or, the second indication information is further used to indicatebeam information of different ports in the second SRS resource, thenumber of different beams indicated for all ports of a second SRSresource is determined by information, in the first indicationinformation, indicating whether the uplink transmission channels of theterminal are coherent; or, the second indication information is used toinstruct the terminal to select, according to a predeterminedport-numbering rule, ports of different antennas to send the SRS signal.

Optionally, the second indication information is also used to indicatethe number of beams, the first indication information is used toindicate whether uplink transmission channels of the terminal arecoherent. The first indication information is used to indicate thatuplink transmission channels of the terminal are non-coherent, and thesecond indication information is specifically used to indicate that thenumber of beams is 1 to indicate one beam for each port; or, the firstindication information is used to indicate phases of uplink transmissionchannels of the terminal are partially coherent, and the secondindication information is specifically used to indicate a beam for eachport pair; or, the first indication information is used to indicatephases of uplink transmission channels of the terminal are partiallycoherent, and the second indication information is specifically used toindicate a beam for each port pair; the above port pair ispre-specified.

Optionally, the second indication information is used to indicate thatthe number of ports of the second SRS resource is 1, the firstpredetermined rule is to identify the second SRS resource as an SRSresource for acquiring channel information of an uplink transmissionchannel in a non-codebook based transmission mode; the second indicationinformation is specifically used to indicate at least one second SRSresource set and a CSI-RS corresponding to each second SRS resource set,and the CSI-RS is specifically used to instruct the terminal tocalculate a precoding vector for an SRS resource within thecorresponding second SRS resource set, or the second indicationinformation is specifically used to indicate a transmission beamcorresponding to each second SRS resource, or, the SRS signal includesat least two first SRS signals, and the second indication information isused to indicate that the terminal sorts the at least two first SRSsignals prior to sending the at least two first SRS signals subjected toprecoding.

Optionally, the second SRS resources are precoded among the antennasthat are coherent, or the second SRS resources are precoded among atleast two antennas that are non-coherent.

Optionally, a rule of the sorting is a predefined rule, or a ruleconfigured by the network device which includes sorting according to acondition of whether phases of ports are coherent.

Optionally, the third indication information is used to indicate thesecond SRS resource. The second SRS resource includes a resource foracquiring channel state information in codebook based transmission, andthe transmission mode of the uplink data is codebook based transmission;or, the second SRS resource includes a resource for acquiring channelstate information in non-codebook based transmission, and thetransmission mode of the uplink data is the non-codebook basedtransmission; or, the second SRS resource does not include the resourcefor acquiring channel state information of a codebook transmissionchannel or the resource for acquiring channel state information of anon-codebook transmission channel, then the transmission mode of theuplink data is the non-codebook based transmission; or, the second SRSresource does not include the resource for acquiring channel stateinformation of the codebook transmission channel or the resource foracquiring channel state information of the non-codebook transmissionchannel, then, the transmission mode of the uplink data is the codebookbased transmission; or, the third indication information directlyindicates whether the transmission mode of the uplink data is thecodebook based transmission or the non-codebook based transmission.

Optionally, the second SRS resource is indicated by an identifier (ID)of the second SRS resource set and an index of a resource in theresource set.

Optionally, when the third indication information or the second SRSresource indicates the non-codebook based transmission, the terminaladopts the same transmission beam and transmission precoding mode asthat for the second SRS resource.

Optionally, when the third indication information or the second SRSresource indicates the codebook based transmission, the terminal employsthe same transmission beam as that for the second SRS resource.

Optionally, the third indication information is used to indicate anassociation relation between a PTRS port and a DMRS port of theterminal; wherein the association relation is used to indicate precodingor a resource location used by the terminal for transmission of a PTRSport.

Optionally, the transmission mode is codebook based transmission, andthe third indication information is also used to indicate coding matrixinformation (Transmission Precoding Matrix Indicator (TPMI)) of theterminal and the maximum number of layers.

Optionally, the sending module 52 is further used to send the fourthindication information to the terminal.

Optionally, the fourth indication information is used to instruct theterminal to use one PTRS port. If the maximum number of PTRS portsindicated by the first indication information is 1 or the fourthindication information is used to instruct the terminal to use one PTRSport, and the maximum number of layers is less than or equal to 4, thenthe PTRS port is associated with a predefined DMRS port; or, if themaximum number of PTRS ports indicated by the first indicationinformation is 1 or the fourth indication information is used toinstruct the terminal to use one PTRS port, and the maximum number oflayers is greater than 4, then the third indication information is usedto indicate that the PTRS port is associated with a predefined DMRSport.

Optionally, the fourth indication information is used to indicate thatthe terminal uses two PTRS ports. If the maximum number of PTRS ports is2 or the fourth indication information is used to instruct that theterminal uses two PTRS ports, and data transmission ports correspondingto the TPMI are in one of two groups of data transmission portsspecified in advance, then the number of PTRS ports available for theDMRS port is equal to 1, and the PTRS port is associated with the DMRSport; or, the maximum number of PTRS ports is 2 or the fourth indicationinformation is used to indicate that the terminal uses two PTRS ports,the data transmission port corresponding to the TPMI is not in one oftwo groups of data transmission ports specified in advance, and thenumber of PTRS ports available for the DMRS port is greater than 1, thefirst DMRS port corresponding to each group of data transmission portsis associated with one PTRS port.

Optionally, a grouping rule for grouping the two groups of datatransmission ports specified in advance is obtained according to acodebook; or, the grouping rule for grouping the two groups of datatransmission ports specified in advance is obtained according tocoherence information, reported by the terminal to the network, oftransmission channels.

Optionally, the first indication information is used to indicate uplinktransmission channels of the terminal are fully-coherent, and the datatransmission ports are grouped into one group; or, the first indicationinformation is used to indicate that the data transmission ports aregrouped into two groups when the uplink transmission channels of theterminal are non-coherent or when the uplink transmission channels ofthe terminal are partially-coherent.

Optionally, the association relation between the PTRS port and the DMRSport is determined by the terminal according to the coherenceinformation among the uplink transmission channels indicated by thefirst indication information.

Optionally, the first DMRS port corresponding to each group of datatransmission ports is determined in a manner specified or configured inadvance.

Optionally, if the transmission mode is the non-codebook basedtransmission, then the second SRS resource indicated by the secondindication information is used to determine the number of PTRS ports,and an association between a DMRS port and a PTRS port used by theterminal.

Optionally, the second SRS resources are a plurality of second SRSresources for non-codebook based transmission, and whether a PTRS portcan be shared among the plurality of second SRS resources is predefinedor configured by the network device.

The terminal provided by some embodiments of the present disclosure canrealize various processes implemented by the terminal in the abovemethod embodiments, and will not be described here in detail in order toavoid repetition.

In the embodiments of the present disclosure, the terminal sends thefirst indication information to the network device. The first indicationinformation is used to indicate, to the network device, at least one offollowing: the number of first Sounding Reference Signal (SRS) resourcesets required by the terminal, the number of first SRS resources in eachof the first SRS resource sets, the maximum number of layers of uplinkmulti-antenna transmission of the terminal, whether uplink transmissionchannels of the terminal are coherent, the maximum number of PTRS (PhaseTracking Reference Signal) ports supported for uplink transmission bythe terminal, wherein the first indication information is used by thenetwork device to determine second indication information, the secondindication information is used to instruct the terminal to send an SRSsignal. The terminal receives the second indication information sent bythe network device, and sends the SRS signal according to the secondindication information.

FIG. 5 is a diagram of a hardware structure of a terminal forimplementing various embodiments of the present disclosure, and theterminal 100 includes, but is not limited to, a radio-frequency (RF)unit 101, a network module 102, an audio output unit 103, an input unit104, a sensor 105, a display unit 106, a user input unit 107, aninterface unit 108, a storage 109, a processor 110, and a power supply111. Those skilled in the art will appreciate that the structure of theterminal shown in FIG. 5 does not constitute a limitation to theterminal, but the terminal may include more or fewer components thanillustrated, or combine certain components, or different componentarrangements. In some embodiments of the present disclosure, theterminal includes, but is not limited to, a mobile phone, a tabletcomputer, a notebook computer, a palmtop computer, an in-vehicleterminal, a wearable device, and a pedometer.

The radio-frequency unit 101 is used to send first indicationinformation to a network device. The first indication information isused to indicate at least one of following: the number of first SoundingReference Signal (SRS) resource sets required by the terminal, thenumber of first SRS resources in each of the first SRS resource sets,the maximum number of layers of uplink multi-antenna transmission of theterminal, whether uplink transmission channels of the terminal arecoherent, the maximum number of PTRS (Phase Tracking Reference Signal)ports outputted by the terminal in uplink; the first indicationinformation is used by the network device to determine second indicationinformation, the second indication information is used to instruct theterminal to send an SRS signal. The radio-frequency unit 101 is used toreceive second indication information sent by the network device; theradio-frequency unit 101 is further used to send an SRS signal accordingto the second indication information.

It should be understood that, in some embodiments of the presentdisclosure, the radio-frequency unit 101 can be used for receiving andsending signals in a process of sending and receiving information orcommunicating, specifically, receiving downlink data from a base stationand delivering the received downlink data to the processor 110 forprocessing; in addition, uplink data is delivered to the base station.Generally, the radio-frequency unit 101 includes, but is not limited to,an antenna, at least one amplifier, a transceiver, a coupler, a lownoise amplifier, a duplexer, and the like. In addition, theradio-frequency unit 101 may also communicate with a network and otherdevices through a wireless communication system.

The terminal provides a user with wireless broadband Internet accessthrough the network module 102, such as helping the user to send andreceive emails, surfing web pages, accessing streaming media, and thelike.

The audio output unit 103 may convert audio data received by theradio-frequency unit 101 or the network module 102 or stored in thestorage 109 into an audio signal and output the same as sound. The audiooutput unit 103 may also provide audio output (e.g., a call signalreception sound, a message reception sound, etc.) related to a specificfunction performed by the terminal 100. The audio output unit 103includes a speaker, a buzzer, a receiver, and the like.

The input unit 104 is used for receiving audio or video signals. Theinput unit 104 may include a Graphics Processing Unit (GPU) 1041 and amicrophone 1042. The graphics processor 1041 processes image data of astill picture or video captured by an image capturing device (such as acamera) in a video capturing mode or an image capturing mode. Theprocessed image frame may be displayed on the display unit 106. Theimage frames processed by the graphics processor 1041 may be stored inthe storage 109 (or other storage medium) or transmitted via theradio-frequency unit 101 or the network module 102. The microphone 1042can receive sound and can process such sound into audio data. Theprocessed audio data may be converted into a format output that may betransmitted to a mobile communication base station via theradio-frequency unit 101 in a case of a telephone call mode.

The terminal 100 also includes at least one sensor 105, such as a lightsensor, a motion sensor, and other sensors. In particular, that lightsensor include an ambient light sensor and a proximity sensor, whereinthe ambient light sensor can adjust the brightness of the display panel1061 according to intensity of ambient light, and the proximity sensorcan turn off a display panel 1061 and/or a backlight when the terminal100 is moved to be close to the ear. As a type of motion sensor, anaccelerometer sensor can detect a magnitude of acceleration in variousdirections (generally three axes), and can detect a magnitude and adirection of gravity when the accelerometer is stationary, and can beused to recognize a posture (such as vertical-horizontal screenswitching, a related game, a magnetometer attitude calibration) of theterminal, vibration recognition related functions (such as a pedometer,a tapping, etc.). The sensor 105 may further include a fingerprintsensor, a pressure sensor, an iris sensor, a molecular sensor, agyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor,and the like, which will not be described herein.

The display unit 106 is used to display information inputted by the useror information provided to the user. The display unit 106 may include adisplay panel 1061, and a Liquid Crystal Display (LCD), an OrganicLight-Emitting Diode (OLED) or the like may be adopted to configure thedisplay panel 1061.

The user input unit 107 may be used to receive inputted digital orcharacter information and generate a key signal input related to a usersetting and a function control of the terminal. Specifically, the userinput unit 107 includes a touch panel 1071 and other input devices 1072.The touch panel 1071, also referred to as a touch screen, may collecttouch operations (e.g., an operation of the user on or near the touchpanel 1071 using any suitable object or accessory such as a stylus or afinger) of the user on or near the touch panel. The touch panel 1071 mayinclude a touch detection device and a touch controller. The touchdetection device detects a touch orientation of the user, detects asignal caused by the touch operation, and transmits the signal to thetouch controller; the touch controller receives touch information fromthe touch detection device, converts it into contact coordinates, andsends the touch information to the processor 110, receives a commandfrom the processor 110, and executes it. Further, the touch panel 1071may be realized in various types such as a resistance type, acapacitance type, an infrared ray type, and a surface acoustic wavetype, and the like. The user input unit 107 may include other inputdevices 1072 in addition to the touch panel 1071. Specifically, theother input devices 1072 may include, but are not limited to, a physicalkeyboard, function keys (such as volume control keys, switch keys,etc.), a trackball, a mouse, and a joystick, which will not be describedherein.

Further, the touch panel 1071 may be overlaid on the display panel 1061,and after the touch panel 1071 detects a touch operation on or near thetouch panel 1071, the touch panel 1071 transmits information of thetouch operation to the processor 110 to determine the type of touchevent, the processor 110 then provides a corresponding visual output onthe display panel 1061 according to the type of touch event. Although inFIG. 5, the touch panel 1071 and the display panel 1061 are two separatecomponents to implement input and output functions of the terminal, theinput and output functions of the terminal may be realized byintegrating the touch panel 1071 and the display panel 1061 in someembodiments, and are not limited herein.

The interface unit 108 is an interface for connecting the terminal 100to an external device. For example, the external device may include awired or wireless headset port, an external power supply (or batterycharger) port, a wired or wireless data port, a memory card port, a portfor connecting a device having an identification module, an audioinput/output (I/O) port, a video I/O port, a headphone port, and so on.The interface unit 108 may be used to receive input (e.g., datainformation, power or the like) from an external device and transmitsthe received input to one or more elements within the terminal 100, ormay be used to transmit data between the terminal 100 and an externaldevice.

The storage 109 may be used to store software programs as well asvarious data. The storage 109 may mainly include a storage program areaand a storage data area, wherein the storage program area may store anoperating system, an application program required for at least onefunction, such as a sound playing function, an image playing function,and the like; the storage data area may store data (such as audio data,a phonebook, etc.) created according to use of a mobile phone. Inaddition, the storage 109 may include a high speed random access memory,and may also include a non-volatile storage, such as at least one diskstorage device, a flash memory device, or other volatile solid-statestorage devices.

The processor 110 is a control center of the terminal, connects variousparts of the entirety of the terminal using various interfaces andlines, executes various functions and processes data of the terminal byrunning or executing software programs and/or modules stored in thestorage 109 and calling the data stored in the storage 109, therebyintegrally monitoring the terminal. The processor 110 may include one ormore processing units; optionally, the processor 110 may integrate anapplication processor and a modem processor. The application processormainly processes an operating system, a user interface, an applicationprogram, etc., and the modem processor mainly processes wirelesscommunication. It will be appreciated that the above-described modemprocessor may also not be integrated into the processor 110.

The terminal 100 may also include a power supply 111 (such as a battery)that supplies power to various components; optionally, the power supply111 may be logically connected to the processor 110 through a powermanagement system so that functions such as charging, discharging andpower consumption management may be achieved through the powermanagement system.

In addition, the mobile terminal 100 includes some functional modulesnot shown, which will not be described here.

Optionally, the embodiments of the present disclosure provide aterminal. The terminal includes a processor, a storage, and a computerprogram stored on the storage and executed by the processor, whereinwhen the steps are performed by the processor, the processor implementsthe steps of the signal transmission method performed by the terminal inthe method embodiments described above.

FIG. 6 is a diagram of a hardware structure of a network device forimplementing various embodiments of the present disclosure, and thenetwork device 700 includes a processor 701, a transceiver 702, astorage 703, a user interface 704, and a bus interface.

The transceiver 702 is used to receive first indication information sentby the terminal. The first indication information is used to indicate,to the network device, at least one of following: the number of firstSounding Reference Signal (SRS) resource sets required by the terminal,the number of first SRS resources in each of the first SRS resourcesets, the maximum number of layers of uplink multi-antenna transmissionof the terminal, whether uplink transmission channels of the terminalare coherent, the maximum number of PTRS (Phase Tracking ReferenceSignal) ports supported for uplink transmission by the terminal. Thefirst indication information is used by the network device to determinesecond indication information, the second indication information is usedto instruct the terminal to send an SRS signal. The processor 701 isused to determine the second indication information according to thefirst indication information; the transceiver 702 is used to transmitthe second indication information to the terminal; the transceiver 702is further used to receive an SRS signal transmitted by the terminal.

In some embodiments of the present disclosure, in FIG. 6, a busarchitecture may include any number of interconnected bus and bridges,specifically various circuitry including one or more processorsrepresented by the processor 701 and a storage represented by thestorage 703 are linked together by the bus architecture. The busarchitecture may also link together various other circuits, such asperipheral devices, regulators, and power management circuits, which arewell known in the art, and thus will not be described further herein. Abus interface provides an interface. The transceiver 702 may be aplurality of elements, i.e., including a transmitter and a receiver, forproviding units for communicating with various other devices over atransmission medium. For different user devices, a user interface 704may also be an interface capable of externally or internally interfacingwith a desired device including, but not limited to, a keypad, adisplay, a speaker, a microphone, a joystick, or the like. The processor701 is responsible for managing a bus architecture and generalprocessing, and the storage 703 may store data used by the processor 701in performing operations.

In addition, the network device 700 also includes some functionalmodules not shown, which will not be described here.

Optionally, the embodiments of the present disclosure provide a networkdevice. The network device includes a processor, a storage, and acomputer program stored on the storage and executable by the processor,wherein when the computer program is executed by the processor, theprocessor implements the steps in the signal transmission methodperformed by the network device in the above method embodiments.

Optionally, the embodiments of the present disclosure provide a computerreadable storage medium. The computer readable storage medium ischaracterized in that, a computer program is stored on the computerreadable storage medium, processes in the signal transmission method inthe method embodiments described above are implemented when the computerprogram is executed by a processor, the same technical effect can beachieved. In order to avoid duplication, the processes will not berepeated. The computer readable storage medium is, for example, aRead-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk oran optical disk, etc.

It should be noted that such terms as “include”, “comprise”, or anyother variation thereof are intended to encompass a non-exclusiveinclusion such that processes, methods, articles, or devices including aseries of elements include not only those elements, but also includeother elements that are not explicitly listed, or include elementsinherent to such processes, methods, articles, or devices. In theabsence of further limitations, an element defined by a statement“including one” is not excluded from coexistence with another identicalelement in a process, a method, an article, or a device that includesthe element.

From the above description of the embodiments, those skilled in the artmay clearly grasp that methods in the above embodiments may beimplemented by means of software plus a necessary hardware platform, andof course may also be implemented by hardware. However, in many casesthe former is a better implementation. Based on this understanding, anessential part, or a part contributing the prior art, of technicalsolutions of the present disclosure can be embodied in the form of asoftware product stored in a storage medium such as a ROM/RAM, amagnetic disk, an optical disc, or the like. Several instructions areincluded in the storage medium to cause a terminal (which may be amobile phone, a computer, a server, an air-conditioner, or a networkdevice, etc.) to perform the methods of various embodiments of thepresent disclosure.

The embodiments of the present disclosure have been described above inconjunction with the accompanying drawings, but the present disclosureis not limited to specific embodiments described above which are merelyillustrative and not limiting. A person of ordinary skills in the artmay, under teachings of the present disclosure, make many forms withinthe protection scope of the present disclosure without departing fromthe spirit of the present disclosure and the protection scope of theclaims.

1. A signal transmission method, wherein, the method comprises: sending,by a terminal, first indication information to a network device; whereinthe first indication information is used to indicate, to the networkdevice, at least one of following: the number of first SoundingReference Signal (SRS) resource sets required by the terminal, thenumber of first SRS resources in each of the first SRS resource sets,the maximum number of layers of uplink multi-antenna transmission of theterminal, whether uplink transmission channels of the terminal arecoherent, and the maximum number of Phase Tracking Reference Signal(PTRS) ports supported for uplink transmission by the terminal, whereinthe first indication information is used by the network device todetermine second indication information, the second indicationinformation is used to instruct the terminal to send an SRS signal;receiving, by the terminal, the second indication information sent bythe network device; sending the SRS signal by the terminal according tothe second indication information.
 2. The method according to claim 1,wherein, the first indication information is further used by the networkdevice to determine third indication information, the method furthercomprises: receiving, by the terminal, the third indication informationsent by the network device, wherein the third indication information isused to indicate a transmission mode of uplink data sent by the terminalto the network device, the transmission mode comprises codebook basedtransmission and non-codebook based transmission; sending, by aterminal, the uplink data to the network device, according to thetransmission mode indicated by the third indication information. 3.(canceled)
 4. (canceled)
 5. The method according to claim 2, wherein,the first indication information comprises at least one of following:the number of first SRS resource sets, the number of first SRS resourcesin each of the first SRS resource sets, the maximum number of layers,coherence information among uplink transmission channels, and themaximum number of PTRS ports; wherein the coherence information amongthe uplink transmission channels is used to indicate the maximum numberof PTRS ports; or, the maximum number of layers and the number of firstSRS resource sets are used to indicate the maximum number of PTRS ports;or, the maximum number of PTRS ports is used to indicate whether theuplink transmission channels are coherent; or, the maximum number ofPTRS ports and the number of layers are used to indicate whether theuplink transmission channels are coherent.
 6. The method according toclaim 5, wherein, coherence information among uplink transmissionchannels is used to indicate the maximum number of PTRS ports; the firstindication information is used to indicate uplink transmission channelsof the terminal are fully-coherent, and the first indication informationis that the maximum number of PTRS ports is 1; or, the first indicationinformation is used to indicate that uplink transmission channels of theterminal are non-coherent, and the first indication information is thatthe maximum number of PTRS ports is same as the maximum number oflayers; or, the first indication information is used to indicate theuplink transmission channels of the terminal are partially-coherent, andthe first indication information is that the maximum number of PTRSports is the number of first SRS resource sets; or, the maximum numberof layers and the number of first SRS resource sets are used to indicatethe maximum number of PTRS ports; the first indication information isused to indicate that the number of first SRS resource sets is 1 and themaximum number of layers is greater than 1, and the first indicationinformation is that the maximum number of PTRS ports is 1; or, the firstindication information is used to indicate that the number of first SRSresource sets is same as the maximum number of layers, and the firstindication information is that the maximum number of PTRS ports is sameas the maximum number of layers; or, the first indication information isused to indicate that the number of first SRS resource sets is greaterthan 1 and the maximum number of layers is greater than 1 and themaximum number of PTRS ports, and the first indication information isthat the maximum number of PTRS ports is the number of first SRSresource sets; or, the maximum number of PTRS ports is used to indicatewhether the uplink transmission channels are coherent; the firstindication information is used to indicate uplink transmission channelsof the terminal are fully-coherent, and the first indication informationis that the maximum number of PTRS ports is 1; or, the maximum number ofPTRS ports is used to indicate whether the uplink transmission channelsare coherent; the first indication information is used to indicate thatuplink transmission channels of the terminal are non-coherent, and thefirst indication information is that the maximum number of PTRS ports issame as the maximum number of layers, and, the maximum number of PTRSports is great than 1; or, the first indication information is used toindicate the uplink transmission channels of the terminal arepartially-coherent, the first indication information is that the maximumnumber of PTRS ports is greater than 1, and, the maximum number of PTRSports is less than the maximum number of layers.
 7. (canceled) 8.(canceled)
 9. The method according to claim 1, wherein, the secondindication information is used to instruct the terminal to send the SRSsignal according to a first predetermined rule, the second indicationinformation is used to instruct the terminal to identify a second SRSresource according to a first predetermined rule; the firstpredetermined rule comprises: identifying the second SRS resource as anSRS resource for acquiring channel information for an uplinktransmission channel in the codebook based transmission, or identifyingthe second SRS resource as an SRS resource for acquiring channelinformation for an uplink transmission channel in non-codebook basedtransmission. 10-23. (canceled)
 24. The method according to claim 2,wherein, the transmission mode is codebook based transmission, the thirdindication information is further used to indicate TransmissionPrecoding Matrix Indicator (TPMI) of the terminal and the maximum numberof layers.
 25. The method according to claim 24, wherein, the methodfurther comprises: receiving, by the terminal, fourth indicationinformation sent by the network device; the fourth indicationinformation is used to instruct the terminal to use one PTRS port; ifthe maximum number of PTRS ports indicated by the first indicationinformation is 1 or the fourth indication information is used toinstruct the terminal to use one PTRS port, and the maximum number oflayers is less than or equal to 4, then the PTRS port is associated witha predefined DMRS port; or, if the maximum number of PTRS portsindicated by the first indication information is 1 or the fourthindication information is used to instruct the terminal to use one PTRSport, and the maximum number of layers is greater than 4, then the thirdindication information is used to indicate that the PTRS port isassociated with a predefined DMRS port.
 26. (canceled)
 27. The methodaccording to claim 25, wherein, the fourth indication information isused to instruct the terminal to use two PTRS ports; if the maximumnumber of PTRS ports is 2 or the fourth indication information is usedto instruct the terminal to use two PTRS ports, and data transmissionports corresponding to the TPMI are in one of two groups of datatransmission ports specified in advance, then the number of PTRS portsavailable for the DMRS port is equal to 1, and the PTRS port isassociated with the DMRS port; or, if the maximum number of PTRS portsis 2 or the fourth indication information is used to instruct theterminal to use two PTRS ports, the data transmission port correspondingto the TPMI is not in one of two groups of data transmission portsspecified in advance, then the number of PTRS ports available for theDMRS port is greater than 1, and a first DMRS port corresponding to eachgroup of data transmission ports is associated with one PTRS port. 28.The method according to claim 27, wherein, a grouping rule for groupingthe two groups of data transmission ports specified in advance isobtained according to a codebook; or, the grouping rule for grouping thetwo groups of data transmission ports specified in advance is obtainedaccording to coherence information, reported by the terminal to anetwork, of transmission channels. 29-31. (canceled)
 32. The methodaccording to claim 2, wherein, if the transmission mode is thenon-codebook based transmission, then the second SRS resource indicatedby the second indication information is used to determine the number ofPTRS ports, and an association between a DMRS port and a PTRS port usedby the terminal.
 33. The method according to claim 32, wherein, thesecond SRS resource is a plurality of second SRS resources fornon-codebook based transmission, and whether a PTRS port is shared amongthe plurality of second SRS resources is predefined or configured by thenetwork device.
 34. A signal transmission method, wherein, the methodcomprises: receiving, by a network device, first indication informationsent by a terminal; wherein the first indication information is used toindicate, to the network device, at least one of following: the numberof first Sounding Reference Signal (SRS) resource sets required by theterminal, the number of first SRS resources in each of the first SRSresource sets, the maximum number of layers of uplink multi-antennatransmission of the terminal, whether uplink transmission channels ofthe terminal are coherent, and the maximum number of Phase TrackingReference Signal (PTRS) ports supported for uplink transmission by theterminal, wherein the first indication information is used by thenetwork device to determine second indication information, the secondindication information is used to instruct the terminal to send an SRSsignal; determining the second indication information by the networkdevice according to the first indication information; sending the secondindication information to the terminal by the network device; receiving,by the network device, the SRS signal sent by the terminal.
 35. Themethod according to claim 34, wherein, the first indication informationis further used by the network device to determine third indicationinformation, the method further comprises: determining the thirdindication information by the network device according to the firstindication information; sending the third indication information to theterminal by the network device; wherein the third indication informationis used to indicate a transmission mode of uplink data sent by theterminal to the network device, the transmission mode comprises codebookbased transmission and non-codebook based transmission; receiving, bythe network device, the uplink data sent by the terminal according tothe transmission mode indicated by the third indication information.36-41. (canceled)
 42. The method according to claim 34, wherein, thesecond indication information is used to instruct the terminal to sendthe SRS signal according to a first predetermined rule; the secondindication information is used to instruct the terminal to identify asecond SRS resource according to a first predetermined rule; the firstpredetermined rule comprises: identifying the second SRS resource as anSRS resource for acquiring channel information for an uplinktransmission channel in the codebook based transmission, or identifyingthe second SRS resource as an SRS resource for acquiring channelinformation for an uplink transmission channel in non-codebook basedtransmission. 43-56. (canceled)
 57. The method according to claim 35,wherein, the transmission mode is codebook based transmission, the thirdindication information is further used to indicate TransmissionPrecoding Matrix Indicator (TPMI) of the terminal and the maximum numberof layers.
 58. The method according to claim 57, wherein, the methodfurther comprises: sending fourth indication information to the terminalby the network device; the fourth indication information is used toinstruct the terminal to use one PTRS port; if the maximum number ofPTRS ports indicated by the first indication information is 1 or thefourth indication information is used to instruct the terminal to useone PTRS port, and the maximum number of layers is less than or equal to4, the PTRS port is associated with a predefined DMRS port; or, if themaximum number of PTRS ports indicated by the first indicationinformation is 1 or the fourth indication information is used toinstruct the terminal to use one PTRS port, and the maximum number oflayers is greater than 4, then the third indication information is usedto indicate that the PTRS port is associated with a predefined DMRSport.
 59. (canceled)
 60. The method according to claim 58, wherein, thefourth indication information is used to instruct the terminal to usetwo PTRS ports; if the maximum number of PTRS ports is 2 or the fourthindication information is used to instruct the terminal to use two PTRSports, and data transmission ports corresponding to the TPMI are in oneof two groups of data transmission ports specified in advance, then thenumber of PTRS ports available for the DMRS port is equal to 1, and thePTRS port is associated with the DMRS port; or, if the maximum number ofPTRS ports is 2 or the fourth indication information is used to instructthe terminal to use two PTRS ports, the data transmission portcorresponding to the TPMI is not in one of two groups of datatransmission ports specified in advance, then the number of PTRS portsavailable for the DMRS port is greater than 1, and a first DMRS portcorresponding to each group of data transmission ports is associatedwith one PTRS port; a grouping rule for grouping the two groups of datatransmission ports specified in advance is obtained according to acodebook; or, the grouping rule for grouping the two groups of datatransmission ports specified in advance is obtained according tocoherence information, reported by the terminal to a network, oftransmission channels. 61-64. (canceled)
 65. The method according toclaim 35, wherein, if the transmission mode is the non-codebook basedtransmission, then the second SRS resource indicated by the secondindication information is used to determine the number of PTRS ports,and an association between a DMRS port and a PTRS port used by theterminal. 66-132. (canceled)
 133. A terminal, wherein, the terminalcomprises a processor, a storage, and a computer program stored on thestorage and executable by the processor, wherein when the computerprogram is executed by the processor, the processor implements the stepsof the signal transmission method according to claim
 1. 134. A networkdevice, wherein, the network device comprises a processor, a storage,and a computer program stored on the storage and executable by theprocessor, wherein when the computer program is executed by theprocessor, the processor implements the steps of the signal transmissionmethod according to claim
 34. 135. (canceled)